The NP14ZL 2.97-4.79:1 Zoom Lens from NEC is an accessory lens designed for the NP-PA600X, NP-PA500X, NP-PA550W, NP-PA500U, NP-PA500X-13ZL, NP-PA500U-13ZL, NP-PA550W-13ZL, and NP-PA600X-13ZL projectors.